Which fans should I get?

[Alexikik]

Hey, I'm doing a full upgrade of my pc. The last thing I need to settle is what fans I should get. At the moment I have a small and a big fan (back and front). They are both with 3 pin conecters.
I wan't two big new fans, with 4 pin connecters. but which ones? I want to overclock my cpu and gpu, too.

 

[CountMike]

You can put only as big fans as case allows.

 

[Alexikik]

Yeah but what brand should I go for?

 

[CountMike]

Look at Cooler master, JetFlo 120 R4-JFNP-20PK-R1 and Noctua line.